web browserとは？ わかりやすく解説

<ComVisibleAttribute(True)> _
<ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)> _
Public Class WebBrowser
    Inherits WebBrowserBase

Dim instance As WebBrowser

[ComVisibleAttribute(true)] 
[ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch)] 
public class WebBrowser : WebBrowserBase

[ComVisibleAttribute(true)] 
[ClassInterfaceAttribute(ClassInterfaceType::AutoDispatch)] 
public ref class WebBrowser : public
 WebBrowserBase

/** @attribute ComVisibleAttribute(true) */ 
/** @attribute ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) */ 
public class WebBrowser extends WebBrowserBase

ComVisibleAttribute(true) 
ClassInterfaceAttribute(ClassInterfaceType.AutoDispatch) 
public class WebBrowser extends
 WebBrowserBase

' Navigates to the URL in the address box when 
' the ENTER key is pressed while the ToolStripTextBox has focus.
Private Sub toolStripTextBox1_KeyDown( _
    ByVal sender As Object,
 ByVal e As KeyEventArgs) _
    Handles toolStripTextBox1.KeyDown

    If (e.KeyCode = Keys.Enter) Then
        Navigate(toolStripTextBox1.Text)
    End If

End Sub

' Navigates to the URL in the address box when 
' the Go button is clicked.
Private Sub goButton_Click( _
    ByVal sender As Object,
 ByVal e As EventArgs) _
    Handles goButton.Click

    Navigate(toolStripTextBox1.Text)

End Sub

' Navigates to the given URL if it is valid.
Private Sub Navigate(ByVal
 address As String)

    If String.IsNullOrEmpty(address) Then
 Return
    If address.Equals("about:blank")
 Then Return
    If Not address.StartsWith("http://")
 And _
        Not address.StartsWith("https://")
 Then
        address = "http://" & address
    End If

    Try
        webBrowser1.Navigate(New Uri(address))
    Catch ex As System.UriFormatException
        Return
    End Try

End Sub

' Updates the URL in TextBoxAddress upon navigation.
Private Sub webBrowser1_Navigated(ByVal
 sender As Object, _
    ByVal e As WebBrowserNavigatedEventArgs)
 _
    Handles webBrowser1.Navigated

    toolStripTextBox1.Text = webBrowser1.Url.ToString()

End Sub

// Navigates to the URL in the address box when 
// the ENTER key is pressed while the ToolStripTextBox has focus.
private void toolStripTextBox1_KeyDown(object
 sender, KeyEventArgs e)
{
    if (e.KeyCode == Keys.Enter)
    {
        Navigate(toolStripTextBox1.Text);
    }
}

// Navigates to the URL in the address box when 
// the Go button is clicked.
private void goButton_Click(object sender,
 EventArgs e)
{
    Navigate(toolStripTextBox1.Text);
}

// Navigates to the given URL if it is valid.
private void Navigate(String address)
{
    if (String.IsNullOrEmpty(address)) return;
    if (address.Equals("about:blank")) return;
    if (!address.StartsWith("http://")
 &&
        !address.StartsWith("https://"))
    {
        address = "http://" + address;
    }
    try
    {
        webBrowser1.Navigate(new Uri(address));
    }
    catch (System.UriFormatException)
    {
        return;
    }
}

// Updates the URL in TextBoxAddress upon navigation.
private void webBrowser1_Navigated(object sender
,
    WebBrowserNavigatedEventArgs e)
{
    toolStripTextBox1.Text = webBrowser1.Url.ToString();
}

// Navigates to the URL in the address text box when 
// the ENTER key is pressed while the text box has focus.
void TextBoxAddress_KeyDown( Object^ /*sender*/, System::Windows::Forms::KeyEventArgs^
 e )
{
   if ( e->KeyCode == System::Windows::Forms::Keys::Enter &&
  !this->TextBoxAddress->Text->Equals( ""
 ) )
   {
      this->WebBrowser1->Navigate( this->TextBoxAddress->Text
 );
   }
}

// Navigates to the URL in the address text box when 
// the Go button is clicked.
void ButtonGo_Click( System::Object^ /*sender*/, System::EventArgs^
 /*e*/ )
{
   if (  !this->TextBoxAddress->Text->Equals(
 "" ) )
   {
      this->WebBrowser1->Navigate( this->TextBoxAddress->Text
 );
   }
}

// Updates the URL in TextBoxAddress upon navigation.
void WebBrowser1_Navigated( Object^ /*sender*/, System::Windows::Forms::WebBrowserNavigatedEventArgs^
 /*e*/ )
{
   this->TextBoxAddress->Text = this->WebBrowser1->Url->ToString();
}

Public Sub New

Dim instance As New WebBrowser

public WebBrowser ()

public:
WebBrowser ()

public WebBrowser ()

public function WebBrowser ()

Private Sub PrintHelpPage()

    ' Create a WebBrowser instance. 
    Dim webBrowserForPrinting As New
 WebBrowser()

    ' Add an event handler that prints the document after it loads.
    AddHandler webBrowserForPrinting.DocumentCompleted, New
 _
        WebBrowserDocumentCompletedEventHandler(AddressOf PrintDocument)

    ' Set the Url property to load the document.
    webBrowserForPrinting.Url = New Uri("\\myshare\help.html")

End Sub

Private Sub PrintDocument(ByVal
 sender As Object, _
    ByVal e As WebBrowserDocumentCompletedEventArgs)

    Dim webBrowserForPrinting As WebBrowser
 = CType(sender, WebBrowser)

    ' Print the document now that it is fully loaded.
    ' webBrowserForPrinting.Print()
    MessageBox.Show("print")

    ' Dispose the WebBrowser now that the task is complete. 
    webBrowserForPrinting.Dispose()

End Sub

private void PrintHelpPage()
{
    // Create a WebBrowser instance. 
    WebBrowser webBrowserForPrinting = new WebBrowser();

    // Add an event handler that prints the document after it loads.
    webBrowserForPrinting.DocumentCompleted +=
        new WebBrowserDocumentCompletedEventHandler(PrintDocument);

    // Set the Url property to load the document.
    webBrowserForPrinting.Url = new Uri(@"\\myshare\help.html");
}

private void PrintDocument(object sender,
    WebBrowserDocumentCompletedEventArgs e)
{
    // Print the document now that it is fully loaded.
    ((WebBrowser)sender).Print();

    // Dispose the WebBrowser now that the task is complete. 
    ((WebBrowser)sender).Dispose();
}